103020400251 has 24 divisors (see below), whose sum is σ = 163449611520. Its totient is φ = 62236578096.

The previous prime is 103020400211. The next prime is 103020400279. The reversal of 103020400251 is 152004020301.

103020400251 is a `hidden beast` number, since 10 + 3 + 0 + 2 + 0 + 400 + 251 = 666.

It is not a de Polignac number, because 103020400251 - 2⁹ = 103020399739 is a prime.

It is a super-2 number, since 2×103020400251² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (103020400211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13092991 + ... + 13100856.

It is an arithmetic number, because the mean of its divisors is an integer number (6810400480).

Almost surely, 2^103020400251 is an apocalyptic number.

103020400251 is a deficient number, since it is larger than the sum of its proper divisors (60429211269).

103020400251 is a wasteful number, since it uses less digits than its factorization.

103020400251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26193895 (or 26193892 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

Adding to 103020400251 its reverse (152004020301), we get a palindrome (255024420552).

The spelling of 103020400251 in words is "one hundred three billion, twenty million, four hundred thousand, two hundred fifty-one".